20118764500 has 48 divisors (see below), whose sum is σ = 45454565520. Its totient is φ = 7770000000.

The previous prime is 20118764383. The next prime is 20118764503. The reversal of 20118764500 is 546781102.

It can be written as a sum of positive squares in 8 ways, for example, as 2351474064 + 17767290436 = 48492^2 + 133294^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118764503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679251 + ... + 708250.

It is an arithmetic number, because the mean of its divisors is an integer number (946970115).

Almost surely, 2^20118764500 is an apocalyptic number.

20118764500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20118764500 is an abundant number, since it is smaller than the sum of its proper divisors (25335801020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20118764500 is a wasteful number, since it uses less digits than its factorization.

20118764500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387549 (or 1387537 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 20118764500 in words is "twenty billion, one hundred eighteen million, seven hundred sixty-four thousand, five hundred".